Specifically created for those requesting that payment be made in fourteen days, this invoice will show the owing party what date the invoice was made and the date by which they are obliged to make said payment. Included on the invoice should be all charges the debtor must pay with a description of each item sold or service provided. Failure to make the payment on time could result in additional fees or charges; furthermore, the collector may choose to send the debtor a Past Due Invoice to remind them of the charges.